Cimmino, S., E. Martuscelli, L. Nicolais and C. Silvestre.1978. Polymer, 19:1222.
2.
Guidetti, G.P. , P. Busi and I. Giulianelli.1983. British Polym. J., 19:757.
3.
Ficker, H.K. and D.A. Walker.1990. Plastics and Rubber Processing and Applications, 14:103.
4.
Byck, J.S., G.L. Goeke and D.A. Walker.1987. Polyolefins V Proceedings, Society of Plastics Engineers RETEC, Houston, Texas , February, 1987, p. 21.
5.
Goodenbour, J.W., I.G. Burstain and W.C. Cummings.1989. Polyolefins VI Proceedings, Society of Plastics Engineers RETEC, Houston, Texas , February 1989, p. 37.
6.
van der Ven, S.1990. Polypropylene and Other Polyolefins. Amsterdam: Elsevier.
7.
Turner-Jones, A.1971. Polymer, 12:487.
8.
Icenogle, R.D. and A.M. Chatterjee.1986. J. Appl. Polym. Sci., 31:1859.
